CE 394K.2 Hyd=
rology &=
nbsp; &nbs=
p; Homework
4: Soil Water Balance &nbs=
p; &=
nbsp;
=
o:p>
Part A.<=
/o:p>
The spreadsheet soilwaterdata.xls
attached to the course web site gives atmospheric flux and soil water balan=
ce
data for the Freeman Ranch, as collected by Dr =
Marcy Litvak (thank you Marcy!!). A portion of the spreadsheet=
is
shown below. What you h=
ave is
latent heat flux (W/m2), and precipitation in mm for each 30 minute period =
for
a week in August 2004, and volumetric soil water content for two soil layer=
s (0
– 10cm, and 10 – 20cm). &=
nbsp;
All data are time-stamped at the beginning
of the 30 minute period to which they apply.
DateTime=
span>
|
LH flux W m-2=
|
soil_water_0_=
10cm
|
soil_water_10=
_20cm
|
rain_Tot mm
|
8/6/04 12:00 AM
|
5.281
|
0.0515269
|
0.0335943
|
0<=
/span>
|
8/6/04 12:30 AM
|
1.89
|
0.0513815
|
0.0331627
|
0<=
/span>
|
8/6/04 1:00 AM=
|
4.234
|
0.0512473
|
0.0329639
|
0<=
/span>
|
8/6/04 1:30 AM=
|
8.76
|
0.0510689
|
0.032785=
|
0<=
/span>
|
8/6/04 2:00 AM=
|
2.075
|
0.0509275
|
0.0327381
|
0<=
/span>
|
and more data go in here=
230;..
8/13/04 10:00 PM
|
-13.508<=
/o:p>
|
0.103742=
|
0.10171<=
/o:p>
|
0<=
/span>
|
8/13/04 10:30 PM
|
-6.058=
o:p>
|
0.103153=
|
0.102137=
|
0<=
/span>
|
8/13/04 11:00 PM
|
4.745
|
0.102582=
|
0.102677=
|
0<=
/span>
|
8/13/04 11:30 PM
|
1.444
|
0.101935=
|
0.103237=
|
0<=
/span>
|
Please do the following:
(1) Prep=
are
plots of the four measured variables over the sampling interval. What can you say about the e=
ffect
of the rainfall on August 6?
Don’t pay too much attention to the flip in latent heat flux w=
hen
the rainfall occurs – Marcy says that is likely a data anomaly that
results from the effect of rainfall on the sampling equipment.
(2)
Convert the latent head flux into evaporation rate in mm/day for eac=
h 15
minute period and make a revised estimate of the actual evaporation during =
the
periods when rainfall occurs.
(3)
Construct a daily soil w=
ater
balance for the site. This sh=
ould
include for each day:
------=_NextPart_01CAA97D.09096FE0
Content-Location: file:///C:/48F244C5/SoilWaterBalance_files/themedata.thmx
Content-Transfer-Encoding: base64
Content-Type: application/vnd.ms-officetheme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------=_NextPart_01CAA97D.09096FE0
Content-Location: file:///C:/48F244C5/SoilWaterBalance_files/colorschememapping.xml
Content-Transfer-Encoding: quoted-printable
Content-Type: text/xml